Re: [Xen-devel] domU crashing, trying to determine why

[micah anderson <micah@xxxxxxxxxx>]

On Sun, 2 Jan 2011 20:39:09 +0200, Pasi KÃrkkÃinen <pasik@xxxxxx> wrote:
> On Sun, Jan 02, 2011 at 01:15:22PM -0500, micah anderson wrote:
> > On Sun, 2 Jan 2011 14:59:13 +0200, Pasi KÃrkkÃinen <pasik@xxxxxx> wrote:
> > > On Sat, Jan 01, 2011 at 07:43:32PM -0500, micah anderson wrote:
> > > > On Sat, 1 Jan 2011 23:41:06 +0200, Pasi KÃrkkÃinen <pasik@xxxxxx> wrote:
> > > > > On Sat, Jan 01, 2011 at 02:16:55PM -0500, Micah Anderson wrote:
> > > > > > 
> > > > > > I'm having a domU that is regularly crashing, without any obvious 
> > > > > > reason
> > > > > > why. I set 'on_crash=preserve' to try and get a crash to try and get
> > > > > > some clues, but what I got doesn't too obvious to me. I was hoping
> > > > > > someone here would be able to give me some clues. 
> > > > > > 
> > > > > > Thanks for any clues anyone can give! Here is what I managed to eke 
> > > > > > out:
> > > > > > 
> > > > > > root@guillemot:/etc/xen# /usr/lib/xen-3.2-1/bin/xenctx -s 
> > > > > > /boot/System.map-2.6.26-2-xen-686 11 0
> > > > > 
> > > > > So the domU has only 1 vcpu? 
> > > > 
> > > > No, I did this for both vcpus, the second one is below:
> > > > 
> > > 
> > > True, I somehow missed the other one.
> > > Did you check debian bugreports if there are other reports like this? 
> > 
> > I did, but I didn't find anything relevant.
> > 
> 
> Can you list the steps to reproduce the bug/crash? Does it happen every time?
> Does it happen if you have only 1 vcpu for the domU?

There really aren't any steps. I 'xm create' the domain, and then what
seems like a random amount of time later, it crashes. Usually that
random amount of time is somewhere between one week and four weeks, but
I've had it happen twice in a weekend. 

I've got this setup:

vcpus=2
cpus=[1,3]

I really need available CPU power of 2 CPUs, or the machine will be too
underpowered... 

m

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